Crosshead for presses



CROSS-HEAD FOR PRESSES Filed Jan. 13, "1947 J yen/a2- Patented Oct. 18, 1949 UNITED STATES PATENT OFFICE CROSSHEAD FOR PRESSES Louis W. Taylor, Oakland, Calif.

Application January 13, 1947, Serial No. 721,715

Claims. (01. 29-283) This invention relates to improvements in arbor presses and particularly to compact, lightweight, high-power manually operatable arbor presses, of a type which can be used in any position and easily and conveniently manually carried to any location, one which can be carried to the work instead of having the work moved to the press.

Arbor presses are generally very heavily built and cannot be moved about and can only be used in one position. This means that many very heavy objects must be transported to the arbor press and set in the press in a particular position, and in connection with automotive work particularly, because of non-portability, unnecessary work is involved because of the necessity of disassembly of many parts or of relatively light-weight parts from heavy structures, which disassembly would be unnecessary if the arbor press could be used in any position and at the job.

My invention provides an arbor press which is ideally adapted to general machine shop and automotive work, being sufliciently light so that it can easily be carried to the job by one man and yet having sufiicient power for handling the majority of all jobs for which a tool of this type is required.

It is ideally adapted for removing and replacing drive pinions, can be used to pull a drive pinion and drive shaft assembly from a rear axle housing, pull the pinion off the shaft, and drive the pinion back on the shaft. It is useful for removing and replacing bearings, cams and other elements.

The objects and advantages of the invention are as follows:

First, to provide an easily portable arbor press.

Second, to provide an arbor press which while being easily carried to a job, can be used in any desired position and has sufficient power to handle the majority of pressing and pulling jobs about a machine shop or garage.

Third, to provide an arbor press of the manually-operable type which can be used in conjunction with a, hydraulic jack where hydraulic operation is desirable.

Fourth, to provide an arbor press which is equally useful for pressing and pulling jobs.

Fifth, to provide an arbor press which is simple in construction and arrangement, easily assembled and disassembled, and adaptable to most types of pressing and pulling operations.

In describing the invention reference will be made to the accompanying drawings, in which:

Fig. 1 is a front elevation of the invention, illustrating the pressing of a drive pinion onto a drive shaft.

Fig. 2 is a section taken on line 22 of Fig. 1.

Fig. 3 is a plan view of one of a pair of thrust plates or dies for use in connection with the forcing of an automotive drive pinion on a drive shaft, for engagement in an annular groove in the drive assembly.

Fig. 4 is a side elevation of one of the arbor press heads.

The invention includes a pair of jack screws l0 and I I both of which are threaded throughout their lengths, and each of which is provided with six nuts l2, l2 and I2" together with thrust washers l3 which may, if desired, consist of thrust ball bearings for ease of adjustment of the nuts under load.

The invention also includes three cross members, I4, l5 and I6 either of which can be used as base, head, or stabilizing center plate or thrust plate, all three being easily removable and replaceable at will without removal of any of the nuts or washers from the screws and without disturbing the other heads.

Cross-member I4 is used as the base for pressing drive pinions on drive shafts of automotive vehicles, while cross-member [5 functions as the base for pressing drive shafts out of drive pinions,

and cross-member l6 functions as the base in some cases such as for removal of certain types of bearings and bushings, so that the three crossmembers are selectively usable for base or head.

Each of the cross-members is removable and replaceable on the jack screws at will without .disturbing the others, and each consists ofa jackknife combination of two elements hinged together atone end and secured at the other by a locking device such as a pin.

The cross-member [4 therefore consists of the two members I! and I8. Member I! has a groove l9 formed in the inside face, while member l8 has a tongue 20 which closely fits in the groove I9; the tongue having slots H and 22 to clear the jackscrews, leaving ears at '23 and 24 respectively for the hinge pin 25 and lock pin 26. The memhers I! and I8 are each built up of three plates with the center plates protruding to form the tongue on one member, and being retracted on the other member to form the groove, and the center plates being separated to form a transverse passage 21.

Cross-members l and I6 are constructed identical with cross-member 14 with the exception that there is only a single center plate extending throughout the width and there is no transverse slot, merely a hole 28 of a suitable size for the work on which the operation is to be performed, in the cross-member l5; and a threaded passage for the thrust screw 29 in the cross-member I6.

A pair of dies 30 *slidably fits in'the transverse slot 21, and are respectively inserted from opposite sides and pinned through aligned passages 31, 32 and 33, the cross-member [4 having a central hole larger in diameter than eithr'tif the recesses 34 or 35 in the dies.

The thrust screw 29 is provided with'a receding center 36 for aligning the shaft,"an'd has a removable ball-thrust bearing 31 for cooperation with the hub portion of the pinion. Aconv'ehtional hydraulic jack can be mounted on either of *tiie-iieeasmer-re as-indicated et 'ss and 3 9.

For pressing a drive pinion on a drive shaft, Tall "threfl'1ea"c l's -should be used. The assembly "includes -the drive pinion "40, spacer 4!, antifric'tidn'bziiirigs "42 and W3, the shaft "proper 44 *anwterqiiemember 45. rhe member as has an annular groove into which the dies'3'0 fit and therebyitaliethefeiitireithrust, and the recesses "e'uaii ss'ar'e made to different diameters to seat "at the bottoms of th "grooves or "different shaft assemblies, so that for drive fa'ssemblies from niirerent automotivevehicles it'is merely necessary to.change the die section's end for end.

For'pr'es'si'ng a drive"pinio'n on the drive'shaft, thescrew 291s retracted, the nuts l2'and l2 are freed, the pins Z lif areiemovedand bothcross 'rnefriber's "l4 and i5 are 'laid .open. The drive 'l-sliaft assembly is "then laid in position, or the press isf'b'rought'iip' to the work, the cross members m-v and 5' were "then "a set and the pins '26 re-inserte'd. and'thehuts 'l2 and '52 are then adjustedto secure the :two members in the most advantageous .position's'with member l5 clampingaboutthebacking nut f46an'd the slot 2'! approximately in registry with the annular. groove. -The-.pair of dies istthen inserted in the slot 21, andmade to enter 'the annular groove'and the pins 26 inserted in theholesl3l, 32, 33. This secures the-assembly in positionto take any desired thrust.

-'-Next the pinion 40 is placed in ..position To'n the'end of "the shaft, the screw-29 then-being advanced tocontactthe huhface, and is then :screwed'in by using-asuitablewrench or the like, forcing theipinion on the shaft. The assemb1y is-removed by freeing the nuts I 2 and H removing the pins 26, and 7 opening the --two 'cross members.

=A hydraulic -jack can'be substituted for the screw 29 if desired, the cross-members being suitably separatedto accommodate the jack.

For removing the pinion from-a drive-shaft, tl'ie member I 4 "is not needed. In that case "the -cross=member 15 -functions as the base. One 'of the bearings'm' thrusts-against the inside face "of th'e memher'iii. The thrust bearing 31 is removeurremtm "thrust screw-29=so that the end of "the screw will work on the end of the shaft. Thus by adjusting the screw 29, the shaft is forced out of the pinion.

Other operations are carried out similarly,

some requiring only the two end cross-members, while in other cases all three, or, the center member with either of the two end members, depending on the specific operation to be performed and the character and form of the structure.

I claim:

1. A cross-head for an arbor press comprising; two elongated members hinged together at one end and having locking means at the other end and keying means cooperating between the two members when locked together to align and reinforce the members; a jack-screw-passage formed -a'djacehteach end and a shaft passage formed centrally of the members, a die passage formed \transversely and extending through the two members centrally thereof, and a pair of half tlies slidable in said die passage and having semicircular recesses formed inwardly from the sides "and combining when inserted in different posi- -tiohs to forrn thrust collars of dififerent diameters to engage in annular recesses formed in shafts of different diameters.

2. A cross-head for'an arbor press comprisin "a *jakknii'e combination of "two elongated iniembers hingedtogether "atone end and havi'n'g locking 'fm'e'an's {for locking the 'two =rn'embers to- "gether-atthe other end and 'h'aving a jack-screw passage formed adjacent each end and having a shaftpassage formed-centrally with the axes of "the 'passa'ges coincident with the parting line between the twomembers, and a transverse p'asjsag'e form-ed centrally of the height and of the ength of the "two members "to slidably receive 'shaft "passage size reducing collar "members "to enga e in anmila'r'reces'ses iormed insnarts and 'tlielike.

"3. A structure as'dfinedi claim 2; said members being "each formed "of three plates secured together with thecent'ral oneof the plates proj'ectii'iginwariflyTroin 'onemember toward the other member to *form a'to'nguejand with the central' one d-f' 'the "plates'of the other member being retracted to "form a "groove for the reception ofsaid tongue to form said jack-knife c'ofnbih a'tion, said rltral onesof said'plates termi- "Iiatiri'g'in-spacdrelation onopp'ositesides of the axis of the shaftp'assa'g'eto'iorm said'transverse "passage 'therebtween.

4. Astrii ture as definedinelaim'Z; die members "comprising each a plate to slidably fit in said-transverse -passage and each having semicircular -fecesses of different radii formed inwardlyifron the respective sides with the axes coincident with the edges .of the die 'membersto form,=in combination, collars to fit in-annular recesses formed inshafts and thelikeand means for locking said die members in cooperativeposition in said transverse recess.

5. A structure as defined in claim-2;-said-memhers I beingeach -formed of three ,-plates secured ,togetherinJaminatedarrangement with the central one ofthe plates of one member proj ect-ing toward-the other-member toform a tongue, "and 'with the -oentral e one of the tpl-ates of the i other member being retracted to forma grooveforreception of -said -tongne to form -the siack knife combination, said central ones of-saidplates'both terminating in spaced relation I on opposite sides of the longitudinal center ot-theinembers-toform said transverse passage therebetween, F and "die members comprising eaeh -ae plate'tosl-idably' fit in said transverse 1 passage and each having -'-semiicirc ularrecesses formed inwardly from "the respective side edges with the axes coincident with said side edges with the semi-circular recesses in each die member being of different. radii to form in combination circular openings of different diameters to fit in annular recesses of different root diameters on shafts and the like, and means for locking said die members in cooperative position in said transverse passage.

LOUIS W. TAYLOR.

REFERENCES CITED The following references are of record in the file of this patent:

Number Number UNITED STATES PATENTS Name Date Baker June 9, 1885 Erickson May 10, 1921 Miles Jan. 23, 1923 Tindell June 29, 1926 De Moore Mar. 18, 1947 FOREIGN PATENTS Country Date Great Britain Feb. 16, 1922 

